A turbine receives steam at 100 bar, 600°C and exhausts it at 2 bar from which it is used for process heating; AP and AK are negligible (a) For ideal Rankine engine, determine work (kJ/kg) steam rate (kg/hr), thermal efficiency and mean effective pressure. (b) For the actual engine, the brake efficiency is 84%; the driven generator efficiency is 93% and the rated output of the generator is 30 MW. Estimate the enthalpy h₂' and quality (or superheated) of the exhaust. Compute the combined work (kJ/kg), combined heat rate (kJ/kWh), and the total steam flow for the rated power (kg/hr). h2 = 505 kJ/kg P₂= 2 bar P₁ = 100 bar T₁ = 600°C T₂ = 120.2°C

A turbine receives steam at 100 bar, 600°C and exhausts it at 2 bar from which it is used for process heating; AP and AK are negligible (a) For ideal Rankine engine, determine work (kJ/kg) steam rate (kg/hr), thermal efficiency and mean effective pressure. (b) For the actual engine, the brake efficiency is 84%; the driven generator efficiency is 93% and the rated output of the generator is 30 MW. Estimate the enthalpy h₂' and quality (or superheated) of the exhaust. Compute the combined work (kJ/kg), combined heat rate (kJ/kWh), and the total steam flow for the rated power (kg/hr). h2 = 505 kJ/kg P₂= 2 bar P₁ = 100 bar T₁ = 600°C T₂ = 120.2°C

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Answer a) only

A turbine receives steam at 100 bar, 600°C and exhausts it at 2 bar from which it is used for
process heating; AP and AK are negligible (a) For ideal Rankine engine, determine work (kJ/kg)
steam rate (kg/hr), thermal efficiency and mean effective pressure. (b) For the actual engine, the brake
efficiency is 84%; the driven generator efficiency is 93% and the rated output of the generator is 30
MW. Estimate the enthalpy h₂' and quality (or superheated) of the exhaust. Compute the combined
work (kJ/kg), combined heat rate (kJ/kWh), and the total steam flow for the rated power (kg/hr).
P₂ = 2 bar
h+2 = 505 kJ/kg
P₁ = 100 bar
T₁ = 600°C
T₂ = 120.2°C

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